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Highly selective hydrogenation of phenol to cyclohexanol over nano silica supported Ni catalysts in aqueous medium
Molecular Catalysis ( IF 4.6 ) Pub Date : 2017-08-05 , DOI: 10.1016/j.mcat.2017.07.016
J. He , X.-H. Lu , Y. Shen , R. Jing , R.-F. Nie , D. Zhou , Q.-H. Xia

Cyclohexanol is an excellent starting material for fuel production, but direct selective hydrogenation of phenol to cyclohexanol under mild conditions is a challenge. Herein we report a catalyst made of Ni nanoparticles supported on high-surface silica, which is highly active for selective formation of cyclohexanol under 1.0 Mpa pressure of hydrogen in aqueous medium without additives. Conversion of 100 mol% and selectivity up to 100% are achieved within 4 h and 1.0 MPa H2. Some factors such as the type of the source of silica, the loading of Ni, the reaction temperature and time, the H2 pressure play important roles in controlling the selective hydrogenation. The generality of the 10%Ni/SiO2-1 catalyst for this reaction is demonstrated by selective hydrogenation of other hydroxylated aromatic compounds as well.



中文翻译:

在水性介质中的纳米二氧化硅负载的Ni催化剂上苯酚的高选择性加氢为环己醇

环己醇是生产燃料的极佳原料,但是在温和条件下将苯酚直接选择性氢化为环己醇是一个挑战。本文中,我们报告了一种由负载在高表面二氧化硅上的Ni纳米颗粒制成的催化剂,该催化剂对在无添加剂的水介质中于1.0 Mpa的氢气压力下选择性形成环己醇具有高活性。在4 h和1.0 MPa H 2内实现了100 mol%的转化率和高达100%的选择性。二氧化硅来源的类型,镍的负载量,反应温度和时间,H 2压力等因素在控制选择性加氢中起重要作用。10%Ni / SiO 2的一般性该反应的-1催化剂也可以通过其他羟基化芳族化合物的选择性加氢来证明。

更新日期:2017-08-05
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